US 12,227,677 B2
Adhesive suitable for an on-the-fly roll change of materials with low-energy surfaces
Julia Garbers, Hamburg (DE); Thilo Dollase, Hamburg (DE); Niels Czerwonatis, Hamburg (DE); and Felix Köstner, Hamburg (DE)
Assigned to tesa SE, Norderstedt (DE)
Appl. No. 17/785,788
Filed by tesa SE, Norderstedt (DE)
PCT Filed Dec. 9, 2020, PCT No. PCT/EP2020/085293
§ 371(c)(1), (2) Date Jun. 15, 2022,
PCT Pub. No. WO2021/122227, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 102019220424.4 (DE), filed on Dec. 20, 2019.
Prior Publication US 2023/0070641 A1, Mar. 9, 2023
Int. Cl. C09J 153/02 (2006.01); C09J 11/06 (2006.01); C09J 11/08 (2006.01)
CPC C09J 153/02 (2013.01) [C09J 11/06 (2013.01); C09J 11/08 (2013.01); C09J 2203/342 (2013.01); C09J 2301/408 (2020.08); C09J 2409/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An adhesive tape, comprising:
at least first and second external layers of adhesive, wherein the first external layer of adhesive is an adhesive (I) comprising:
(a) 35 to 55 wt % of an elastomer component, the elastomer component comprising one or more polyvinylaromatic-polydiene block copolymers;
(b) 20 to 45 wt % of a tackifier resin component, the tackifier resin component comprising at least one tackifier resin having a diacetone alcohol cloud point (DACP) of at least −20° C. and a softening temperature (Ring & Ball) of at least 85° C.; and
(c) 15 to 40 wt % of a plasticizing component, wherein
(c1) 8 to 35 wt % of (c) comprises one or more plasticizing oils, and
(c2) up to 32 wt % of (c) comprises one or more non-mineral-oil plasticizers having a softening temperature of less than 30° C. (Ring & Ball);
wherein the second external layer of adhesive differs compositionally from the first external layer of adhesive.